<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>鼠标hover效果</title>
    <style type="text/css">
        body {
            background-color: #eaf0f2;
        }

        h1 {
            font-size: 14px;
            font-family: "Microsoft Yahei";
            text-align: center;
        }

        .paper-flip {
            position: relative;
            width: 500px;
            height: 300px;
            margin: 0 auto;
        }

        .share-layer {
            position: absolute;
            left: 0;
            top: 0;
            width: 500px;
            height: 300px;
            background-color: #fff;
            box-shadow: 0 2px 3px rgba(0, 0, 0, 0.1);
        }

        .btn-wrap {
            pointer-events: none;
            opacity: 0;
            text-align: center;
            margin-top: 140px;
            text-align: center;
        }

        .btn {
            padding: 10px;
            border-radius: 2px;
            color: #fff;
            display: inline-block;
        }

        .btn-facebook {
            background-color: #3b5998;
        }

        .btn-twitter {
            background-color: #00aced;
            margin: 0 20px;
        }

        .btn-google {
            background-color: #d34836;
        }

        .btn-close {
            pointer-events: none;
            position: absolute;
            right: 15px;
            top: 10px;
            color: rgba(0, 0, 0, 0.3);
            font-size: 20px;
            z-index: 11;
            opacity: 0;
            cursor: default;
        }

        .paper-flip.folded .btn-close {
            -webkit-transition: 0.4s;
            transition: 0.4s;
            -webkit-transition-delay: 0.6s;
            transition-delay: 0.6s;
            opacity: 1;
            cursor: pointer;
            pointer-events: initial;
        }

        .paper-flip.folded .btn-wrap {
            opacity: 1;
            -webkit-transition: all 0.4s;
            -o-transition: all 0.4s;
            transition: all 0.4s;
            -webkit-transition-delay: 0.6s;
            -o-transition-delay: 0.6s;
            transition-delay: 0.6s;
            pointer-events: initial;
        }

        .paper-flip.folded .share-layer {
            z-index: 1;
            -webkit-transition: all 0.1s;
            -o-transition: all 0.1s;
            transition: all 0.1s;
            -webkit-transition-delay: 0.4s;
            -o-transition-delay: 0.4s;
            transition-delay: 0.4s;
        }

        /*image-layer*/
        .image-layer {
            width: 500px;
            height: 300px;
            overflow: hidden;
            position: absolute;
            top: 0;
            left: 0;
        }

        .image-layer img {
            width: 500px;
            cursor: pointer;
        }

        .image-layer:before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            border-style: solid;
            border-width: 0;
            border-color: rgba(0, 0, 0, 0.2) #fff;
            border-radius: 0 0 0 4px;
            box-shadow: 0 1px 1px rgba(0, 0, 0, 0.3), -1px 1px 1px rgba(0, 0, 0, 0.2);
            -webkit-transition: all 0.4s ease-out;
            transition: all 0.4s ease-out;
        }

        .image-layer:hover:before {
            border-right-width: 80px;
            border-bottom-width: 80px;
        }

        .paper-flip.folded .image-layer:before {
            border-right-width: 1000px;
            border-bottom-width: 600px;
        }
    </style>
</head>
<body>
<h1>请使用webkit内核标准浏览器查看效果</h1>
<div class="paper-flip" id="paper-flip">
    <div class="share-layer">
        <div class="btn-wrap">
            <a class="btn btn-facebook">FaceBook</a>
            <a class="btn btn-twitter">Twitter</a>
            <a class="btn btn-google">Google +</a>
        </div>
        <span class="btn-close">×</span>
    </div>

    <div class="image-layer" id="image-layer">
        <img src="http://p6.qhimg.com/d/inn/3f563406/table.jpg" alt="">
    </div>

</div>
<script type="text/javascript">
    document.getElementById('paper-flip').addEventListener("click", function (e) {
        if (e.target.className == "btn-close") {
            this.className = "paper-flip";
        } else {
            this.className = "paper-flip folded";
        }
    });
</script>
</body>
</html>